Fun fact: in Dutch, when jokingly telling someone to watch their back, we will say stuff like 'we know where your house lives' or 'I know where your bed sleeps'.
So if someone borrows a shirt for example, you can say: "Ik wil hem wel terug hè? Ik weet waar je huis woont!" (I do want to have it back you know, I know where your house lives!)

I did it right (using "jullie" but would like some grammatical reasons why "Ze kent jouw kinderen" is wrong.) Strictly because in watching a Dutch movie (Ciske de Rat) I heard "Jouw" or "Jou" not sure because they both sound alike to me... but anyway it seemed those were almost always used for "your" suggesting possession. Jullie, I thought was strictly you-plural.